 Ernie Ball 3004 Earthwood 80/20 Bronze Light Acoustic Guitar Strings 3-PackGauges 11-15-22-30-42-52. Pack of 3.Ernie Ball’s 3004 Earthwood 80/20 Bronze Light Acoustic strings are made from 80% copper, 20% zinc wire wrapped around hex-shaped, tin-plated steel core wire. They provide a crisp, ringing sound with pleasing overtones. Accessories, Strings, Guitar Strings, Acoustic Guitar Strings, 6 String Sets for Acoustic Guitar, .011 Gauge Acoustic Guitar Strings Ernie Ball P03004 Ernie Ball, .011 Gauge Acoustic Guitar Strings |